Direct-Conversion to Low-IF Tuner for Digital Audio Broadcast

High-Performance Digital Radio Tuner Incorporates Fast and Accurate RSSI Function

Please check latest availability status for a specific part variant.


The MAX2172 direct-conversion to low-IF tuner is designed for digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (T-DMB) applications, covering an input frequency range of 168MHz to 240MHz (VHF-III), 1452MHz to 1492MHz (L-band), and also 87MHz to 108MHz (FM). The MAX2172 achieves a high level of component integration, allowing lowpower, tuner-on-board designs. The direct-conversion to low-IF architecture eliminates the need for an IF-SAW filter while providing a balanced 2.048MHz center frequency baseband output to the demodulator.

The MAX2172 provides a buffered reference clock at the crystal frequency.

A sigma-delta fractional-N synthesizer is incorporated to optimize both close-in and wideband phase noise performances for OFDM applications where sensitivity to both 1kHz phase noise and wideband phase noise related to strong adjacents can be a problem.

The MAX2172 is available in a 40-pin thin QFN package (6mm x 6mm) with an exposed pad. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.
MAX2172: Functional Diagram MAX2172: Functional Diagram Enlarge+

Key Features

  • +2.7V to +3.5V Supply Voltage Range
  • Low-IF Output Eliminates IF-Saw Filter
  • Integrated FM/VHF-III Bandpass Filter
  • Integrated Low-IF Bandpass Filter
  • Sigma-Delta Fractional-N Synthesizer
  • +45dBc ACPR (N±1)
  • 2.9dB Typical Noise Figure for VHF-III (Includes On-Chip Tracking Filter)
  • 3.1dB Typical Noise Figure for L-Band
  • VHF-III Sensitivity of -101dBm
  • L-Band Sensitivity of -101dBm
  • Baseband Overload Detector Controls RF AGC
  • Fast Channel Scan RSSI 5-Bit Output
  • FM (S+N)/N = 26dB at -111dBm
  • Small 6mm x 6mm Thin QFN Package


  • Fixed and Mobile Digital Audio Broadcast (DAB, DAB+) with FM
  • Terrestrial Digital Multimedia Broadcast (T-DMB) with FM

See parametric specs for Radio Receivers (6)

Part NumberRef. Clock Freq.
IF Output Freq.
Noise Figure
ApplicationsSolutionsBand/ Freq.
(mm x mm)
typSee Notes
MAX2172 24.5762.0482.92.7 to 3.561
87 to 108
168 to 240
1452 to 1492
6.0 x 6.0
$4.12 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX2172EVKIT: Evaluation Kit for the MAX2172

Technical Documents

Tutorial 5100 General Layout Guidelines for RF and Mixed-Signal PCBs
Product Reliability Reports: MAX2172.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


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